Wallace Michael Shawn is an American actor, playwright, essayist, and screenwriter. He is known for playing Vizzini in The Princess Bride (1987), Mr. Hall in Clueless (1995), and Rex in the Toy Story franchise (1995–present).

The Princess Bride is a 1987 American fantasy adventure comedy film directed and co-produced by Rob Reiner and starring Cary Elwes, Robin Wright, Mandy Patinkin, Chris Sarandon, Wallace Shawn, André the Giant, and Christopher Guest. Adapted by William Goldman from his 1973 novel, it tells the story of a swashbuckling farmhand named Westley, accompanied by companions befriended along the way, who must rescue his true love Princess Buttercup from the odious Prince Humperdinck. The film preserves the novel's metafictional narrative style by presenting the story as a book being read by a grandfather to his sick grandson.